Time, polarization, and wavelength multiplexing schemes have been used to satisfy the
growing need of transmission capacity. Using space as a new dimension for communication …

Ring core fibers (RCF) enable high-performance modal multiplexing with low crosstalk and
can support orbital angular momentum (OAM) modes. RCFs are challenging to characterize …

After briefly recalling the issue of OAM mode purity in strongly-guiding ring-core fibers, this
paper provides a methodology to calculate the coupling strength between OAM mode …

We propose and demonstrate the broadband generation of orbital angular momentum
(OAM) beams with high efficiency based on a two-mode fiber long period grating (TMF-LPG) …

We study the design of ring core fibers (RCFs) supporting orbital angular momentum (OAM)
modes for mode division multiplexing (MDM) transmission systems. We develop target …

We experimentally investigate the feasibility of transmission of radio-frequency (RF) signals
over a 900 m polarization-maintaining elliptical ring core fiber. No multiple-input-multiple …

Circular photonic crystal fibers (C-PCFs) have been proved to be a good candidate for
orbital angular momentum (OAM) modes supporting fiber, because they possess many …

Based on the coupling mode theory and numerical simulation, intramode-group coupling in
orbital angular momentum (OAM) fibers with elliptical deformation is analyzed in depth. The …

Based on a systematic approach to expand non-ideal eigenmodes as superposition of ideal
eigenmodes, we develop a theoretical formalism to study mode coupling in perturbed fibers …

Optical data communication based on the orbital angular momentum (OAM) of light is a
recently proposed method to enhance the transmission capacity of optical fibers. This …